Revenue Recognition and Contract Balances - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jul. 02, 2023	Jun. 30, 2024	Jul. 02, 2023
Disaggregation of Revenue [Line Items]
Net sales	$ 1,374.1	$ 1,424.7	$ 2,724.2	$ 2,808.0
United States
Disaggregation of Revenue [Line Items]
Net sales	717.6	736.2	1,412.4	1,432.0
Europe
Disaggregation of Revenue [Line Items]
Net sales	317.7	338.7	649.1	662.7
Asia
Disaggregation of Revenue [Line Items]
Net sales	218.8	232.9	431.8	476.0
All other
Disaggregation of Revenue [Line Items]
Net sales	120.0	116.9	230.9	237.3
U.S. Govt.
Disaggregation of Revenue [Line Items]
Net sales	308.1	316.8	610.8	628.1
Other
Disaggregation of Revenue [Line Items]
Net sales	1,066.0	1,107.9	2,113.4	2,179.9
Digital Imaging
Disaggregation of Revenue [Line Items]
Net sales	739.4	793.3	1,480.2	1,565.8
Digital Imaging | United States
Disaggregation of Revenue [Line Items]
Net sales	325.3	356.4	659.0	690.8
Digital Imaging | Europe
Disaggregation of Revenue [Line Items]
Net sales	201.7	207.3	402.0	404.6
Digital Imaging | Asia
Disaggregation of Revenue [Line Items]
Net sales	136.5	152.4	270.7	310.8
Digital Imaging | All other
Disaggregation of Revenue [Line Items]
Net sales	75.9	77.2	148.5	159.6
Digital Imaging | U.S. Govt.
Disaggregation of Revenue [Line Items]
Net sales	122.3	131.3	253.0	261.6
Digital Imaging | Other
Disaggregation of Revenue [Line Items]
Net sales	617.1	662.0	1,227.2	1,304.2
Instrumentation
Disaggregation of Revenue [Line Items]
Net sales	333.5	328.4	663.9	661.9
Instrumentation | United States
Disaggregation of Revenue [Line Items]
Net sales	153.4	139.4	298.0	277.4
Instrumentation | Europe
Disaggregation of Revenue [Line Items]
Net sales	82.6	95.2	179.5	192.4
Instrumentation | Asia
Disaggregation of Revenue [Line Items]
Net sales	61.9	64.6	122.0	132.1
Instrumentation | All other
Disaggregation of Revenue [Line Items]
Net sales	35.6	29.2	64.4	60.0
Instrumentation | U.S. Govt.
Disaggregation of Revenue [Line Items]
Net sales	29.3	21.3	62.7	44.3
Instrumentation | Other
Disaggregation of Revenue [Line Items]
Net sales	304.2	307.1	601.2	617.6
Aerospace and Defense Electronics
Disaggregation of Revenue [Line Items]
Net sales	194.4	186.0	380.1	359.2
Aerospace and Defense Electronics | United States
Disaggregation of Revenue [Line Items]
Net sales	132.9	126.0	256.6	246.1
Aerospace and Defense Electronics | Europe
Disaggregation of Revenue [Line Items]
Net sales	33.4	36.2	67.6	65.7
Aerospace and Defense Electronics | Asia
Disaggregation of Revenue [Line Items]
Net sales	20.1	15.5	38.7	32.5
Aerospace and Defense Electronics | All other
Disaggregation of Revenue [Line Items]
Net sales	8.0	8.3	17.2	14.9
Aerospace and Defense Electronics | U.S. Govt.
Disaggregation of Revenue [Line Items]
Net sales	60.8	61.0	119.6	125.7
Aerospace and Defense Electronics | Other
Disaggregation of Revenue [Line Items]
Net sales	133.6	125.0	260.5	233.5
Engineered Systems
Disaggregation of Revenue [Line Items]
Net sales	106.8	117.0	200.0	221.1
Engineered Systems | United States
Disaggregation of Revenue [Line Items]
Net sales	106.0	114.4	198.8	217.7
Engineered Systems | Europe
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Engineered Systems | Asia
Disaggregation of Revenue [Line Items]
Net sales	0.3	0.4	0.4	0.6
Engineered Systems | All other
Disaggregation of Revenue [Line Items]
Net sales	0.5	2.2	0.8	2.8
Engineered Systems | U.S. Govt.
Disaggregation of Revenue [Line Items]
Net sales	95.7	103.2	175.5	196.5
Engineered Systems | Other
Disaggregation of Revenue [Line Items]
Net sales	$ 11.1	$ 13.8	$ 24.5	$ 24.6